Roger Federer crashed out of Wimbledon on Wednesday following a 2-6 6-7(5) 7-5 6-4 13-11 quarterfinal loss to South African Kevin Anderson.

Roger Federer Eliminated From Wimbledon

The 36-year-old Swiss, who was the top seed at the tournament this year, won the first two sets but 32-year-old Anderson, the No. 8 seed, rallied to advance to the last four, where he will meet ninth-seeded American John Isner on Friday.

Federer was seeking his ninth Wimbledon trophy. He had last played at Centre Court in 2015. On Wednesday, he wasted a match point in the 10th game of the third set and after five sets, four hours and 14 minutes, Anderson earned the victory.

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Wednesday’s game marked one of the largest upsets at All England Club this year, particularly since Anderson had never before won a set against Federer in any of the other four matches the pair played.

On the women’s side, Serena Williams reached her 10th Wimbledon final after eliminating 13th-seeded German Julia Gorges with a straight-sets (6-2, 6-4) victory. Williams, who is seeking her eighth Wimbledon title, will face 11th-seeded German Angelique Kerber, the World No. 10, in Saturday’s final.

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Should 36-year-old Williams win on Saturday, the victory would mark the 23-time Grand Slam champion’s first title win since becoming a mother. She would also tie Margaret Court’s record of 24 Grand Slam singles trophies. Williams also has a chance to surpass Steffi Graf for second place on the list of female Wimbledon winners, behind only nine-time winner Martina Navratilova.

Kerber and Williams previously met in the Wimbledon final in 2016, when the latter player won.